DALLAS -- A crash on northbound I-35E in Dallas stopped traffic near Empire Central for a few hours Wednesday morning.

Traffic was backed up to Interstate 30 and causing at least an hour delay at 7:30 a.m. Southbound traffic was also backed up to Walnut Hill by onlookers.

The crash involved an 18-wheeler, but no other details have been released.

I-35E has since reopened.